The Crystal Skull is the key to secret extraterrestrial technologies that space aliens left to the ancient Mayan people. The one who takes possession of his secret will become the ruler of the world. The long arms of Moscow are already reaching out to Eldorado. And they should be helped by none other than... the inimitable Indiana Jones, a veteran of the American intelligence services, in whose hands even an ordinary shepherd's whip turns into a formidable weapon.